art/test: support sequential run

Introduce --seq option for art/test/run-all-tests.
This option runs tests one-by-one, avoiding failures
caused by busy CPU

Change-Id: Ibe29f749d267fb05dff4617787c7afcbdbeb43c0
Signed-off-by: Dmitry Petrochenko <dmitry.petrochenko@intel.com>
3 files changed